/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.tribes.group;

import java.io.ObjectInput;
import java.io.Serializable;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectOutput;
import org.apache.catalina.tribes.util.Arrays;

/**
 * <p>
 * Title:
 * </p>
 * 
 * <p>
 * Description:
 * </p>
 * 
 * <p>
 * Company:
 * </p>
 * 
 * @author not attributable
 * @version 1.0
 */
public class RpcMessage implements Externalizable {

	protected Serializable message;
	protected byte[] uuid;
	protected byte[] rpcId;
	protected boolean reply = false;

	public RpcMessage() {
		// for serialization
	}

	public RpcMessage(byte[] rpcId, byte[] uuid, Serializable message) {
		this.rpcId = rpcId;
		this.uuid = uuid;
		this.message = message;
	}

	public void readExternal(ObjectInput in) throws IOException,
			ClassNotFoundException {
		reply = in.readBoolean();
		int length = in.readInt();
		uuid = new byte[length];
		in.read(uuid, 0, length);
		length = in.readInt();
		rpcId = new byte[length];
		in.read(rpcId, 0, length);
		message = (Serializable) in.readObject();
	}

	public void writeExternal(ObjectOutput out) throws IOException {
		out.writeBoolean(reply);
		out.writeInt(uuid.length);
		out.write(uuid, 0, uuid.length);
		out.writeInt(rpcId.length);
		out.write(rpcId, 0, rpcId.length);
		out.writeObject(message);
	}

	public String toString() {
		StringBuffer buf = new StringBuffer("RpcMessage[");
		buf.append(super.toString());
		buf.append("] rpcId=");
		buf.append(Arrays.toString(rpcId));
		buf.append("; uuid=");
		buf.append(Arrays.toString(uuid));
		buf.append("; msg=");
		buf.append(message);
		return buf.toString();
	}

	public static class NoRpcChannelReply extends RpcMessage {
		public NoRpcChannelReply() {

		}

		public NoRpcChannelReply(byte[] rpcid, byte[] uuid) {
			super(rpcid, uuid, null);
			reply = true;
		}

		public void readExternal(ObjectInput in) throws IOException,
				ClassNotFoundException {
			reply = true;
			int length = in.readInt();
			uuid = new byte[length];
			in.read(uuid, 0, length);
			length = in.readInt();
			rpcId = new byte[length];
			in.read(rpcId, 0, length);
		}

		public void writeExternal(ObjectOutput out) throws IOException {
			out.writeInt(uuid.length);
			out.write(uuid, 0, uuid.length);
			out.writeInt(rpcId.length);
			out.write(rpcId, 0, rpcId.length);
		}
	}

}
